I need to know how to get to the answer. Please show all work and formula.

Consider the following Information for a firm financed debt, preferred stock, and common stock: Suppose the stock price is $50, there are 3 million shares of stock, the firm has $25 million of preferred stock, and $75 million of debt. Also cost of component is listed below: Cost of Debt After-Tax =6% Cost of Preferred Stock =8% Cost of Common Stock =11% Tax Rate =30% What is the WACC of this firm? 9.2% [